1 files changed, 19 insertions, 0 deletions
diff --git a/lib/feetx.js b/lib/feetx.js
new file mode 100644
index 00000000..26ade9da
--- /dev/null
+++ b/lib/feetx.js
@@ -0,0 +1,19 @@
+module.exports = async (txid) => {
+    const tx = await bc.getRawTransaction(txid);
+    const transaction = await bc.decodeRawTransaction(tx);
+    let valueIn = 0;
+    let valueOut = 0;
+
+    const txVin = await Promise.all(
+        transaction.vin.map(async o =>
+            await bc.decodeRawTransaction(
+                await bc.getRawTransaction(o.txid)
+            )
+        )
+    );
+
+    txVin.forEach(o => o.vout.forEach(o => valueIn += o.value));
+    transaction.vout.forEach(o => valueOut += o.value);
+
+    return toSats(valueIn - valueOut);
+}